Is this a general prompt on top of GPT or is this a fine tuned model? Since all these books are well known and popular it could be a GPT prompt... "I want you t

Is this a general prompt on top of GPT or is this a fine tuned model? Since all these books are well known and popular it could be a GPT prompt... "I want you to act as if you're a book that knows it's own contents..." or it could be a fine-tuned model. The tuned model would be more interesting as you could feed it new data/books and material.